Hello. I have a leash reactive dog as well. He is fine if he is in the house. If others aren’t comfortable walking him, I ask if they can just play with him in the house. (Rope tug, ball toss, etc.) We also have puzzle toys to stimulate his mind.
Perhaps you could consider these alternatives to walking. It could help you manage and complete this sit without jeopardizing your review.
@Silversitters agree 
@Atillery Did you ever get a response from THS? Did you stay in the sit and finish it out? Please help the forum out by giving us a conclusion of your stay and what advice THS gave you.
Small update - the owner and I have talked - as well as reached out to THS.
I have tried to pick hours to walk the dog when there would be less activity outside. It now seems like every time we go out - there’s dogs everywhere. I’m having to get up at like 6am to walk and then at 10 pm for evening. This is a VERY large and busy city, so there isn’t much to be done about it. I’ve got 3 more days to go.
I’m just going to have to hope for the best. One of the very first things I learned while fostering for the Humane Society is that misplaced aggression is common with a reactive dog. No he’s not going to bite me on purpose, but he could work himself up and bite me on accident. None of which is his fault - nor would I treat the dog badly or do anything to him.
Blame for this issue rest on everyone involved. The Owner for not being very honest about their dogs issues, and not realizing that what might seem minor to them - is major to others. I should have also pushed the topic further as soon as it was brought up. In the future - I will probably ask for a “practice walk” , as someone suggested on our FB group.
BUT Had I actually known the extent of the issue, I for sure would have passed on this sit and chosen another one. IDK about the rest of y’all, but I’d rather not be bitten and make sure the chances of being bitten are as close to 0% as I can get it.
I’m sure the Owner and I will have dueling negative reviews. 
Will you please share THS advice with the forum? It will be helpful for everyone to know what their position is.
@Atillery With regard to a possible negative review, make sure you include in yours your contact, support and advice from THS. You’re doing a great job in a very difficult situation where your safety could accidently be impacted. Take care.
@Atillery I really feel for you in this situation. I have only read the first few comments below and got as far as @Couple_travels_fulltime and wanted to say I completely agree with their advice.
Do NOT walk the dog anymore. You did not sign up to have your life put at risk every time you go out.
I speak from experience.
One our sits in the early days was with a dog who pulled like a maniac. He was not agfressive to other dogs fortunately but the pulling was EXTREME. We were not warned. He was only medium size but super strong. My husband had a shoulder injury (from another dog a few weeks before!) So I was the one trying to control this dog. I literally had to brace myself everytime before opening the door as the dog would shoot out like a greyhound at the starter gun. The house was on a busy main road with the start of the main walking path directly opposite. The dog always dragged me straight over the road and I could not slow him down. A number of times I was sure I’d be hit by a car. It was super stressful. Then the whole walk he pulled massively. 4th day into this one week sit we were crossing a palk when he spotted a small dog far away being led by a very small child. He shot off dragged me off my feet on wet grass and escaped the lead. We were both so worried about that little child and had to shout at the mother to make her aware what was happening. Nothing bad happened -fortunately- We got the dog back and the child was unharmed but this episide was the last straw! We were so angry and stressed we did not walk the dog again. Fortunately the garden was large and he could run around and chase ball. Inside the house (ofcourse!) he was a dream dog!
We did not tell the owners- (early days- fear of bad review) but NEVER again!
We always ask about pulling and aggression now and if an owner were to mislead us we’d feel that grounds to cancel mid sit. Whatever the outcome re-review.
Sitters stand your ground!
I’m sorry it’s come to dueling “negative reviews.” Maybe you could agree to disagree civilly? Pet owners often get so used to behaviors they don’t notice them, are in denial, or think of them as normal. Sitters also have a range of standards about what they’ll tolerate. You agreed to stay and not ruin her vacation, and to research behavior more next sit. She agrees to whatever she agreed to, and maybe to work with a trainer, or at least warn people more. You could both agree on honest but forgiving reviews of each other.
I don’t think you need you worry about a bad review. If I understand the THS rules for sitters, you leaving a sit early for the reasons you’re describing will likely and probably should get you removed from THS entirely.
Actually @OnTheRoadAgain, it seems fairly unusual for folks to be completely removed from THS. Not unheard of though. Sometimes people are reprimanded and/or put on a ‘watch list’ as an interim measure. Hopefully @Atillery has now safely completed the sit and can provide an update soon.
Curious. I doubt we can know if it’s unusual or not. But there have been a handful of queries on this forum from sitters facing appalling conditions or intolerable situations that easily justify abandoning a sit. What-to-do responses from the sitter community have been clear that a sitter should abandon a sit if their personal safety or health were at stake but to expect that the sitter code of conduct in that event is taken extremely seriously by THS (“Once on a sit, I will never arrive later or leave earlier than the agreed date and time.”). As a HO, I would expect no less and would be very unsettled to learn that THS settled for less. A dog that is too leash aggressive is a manageable annoyance which I cannot fathom being close to a justification for abandoning a sit. And, to be clear, @Atillery was asking about abandoning a sit, their use of the more innocuous sounding “cancel” language notwithstanding.
Ah, but I was responding to you stating that the sitter ‘would likely and probably be removed’. I have no more or less access to the statistics on member removal than you. But on the forum, it doesn’t seem to happen too often. Cheers @OnTheRoadAgain
I have great respect for you @Atillery. Fostering dogs for the Humane Society has given you valuable insight into dog behaviors and I also would be concerned about being bitten as you stated. I am hopeful that you were able to safely complete the sit and are planning to leave an accurate review.
That’s the term you’re choosing to refer to someone else’s intentions. The OP was clear that they had got in touch with TH and it’s also clear in the update that they are completing the sit, so “sentencing” them to getting
just because they wrote a post is going a bit too far, IMHO.
I agree that asking a question is no basis for punitive action by THS. Actually leaving the sit under the circumstances described should be.
It is clear from the OP’s followup message that the mid-sit exchange between sitter and HO did not go well. That is no surprise. I would have been furious to have a sitter making noises about “canceling” in the middle of a sit because a small dog’s previously revealed leash aggression was a bigger deal than the no big deal the sitter concluded it would be when they accepted the sit.
I would hope that the OP would share THS’s response to their reaching out.
Ummm … the OP did not say it was a small dog, the OP said it was not a big dog. There is a whole world of medium in between that should be considered.
It still seems to us that you aren’t suggesting options that involve NOT walking the dog. Maybe mental stimulation games indoor, hide n seek, fetch down hallways. Does he have a backyard?
IMO, it is a long jump from a leash reactive dog to having to worry if he is going to bite you. Unless the owner or previous reviews mentioned this…this is not something we would have conjured up. We know that leash reactive dogs do best when NOT on a leash. Why would you continually try and walk this dog (albeit off peak hours) if you know they ARE reactive and in your case, if you think that the misplaced aggression could lead to him biting you.
In our experience, if a dog is reactive, anxious, have some issues, etc…you have to be more mindful of the dog. If he tenses up, if his hair stick up on his back, if he cowers down, if he looks like he would lunge at you…then step away and just give him space. We wouldn’t be scared of a dog bite, it just takes experience reading dog’s behavior.
We would NOT continue to walk that dog and just share our hesitations with the HO. They should be understanding and if they aren’t, oh well and move on. You continually walking the dog is putting yourself in a situation that something might happen to yourself or others. And if something were to happen to others, you would be putting yourself in the middle of a potentially dangerous situation. Why would you continually do this?
We agree that the HO was probably thrown way off guard and upset about a sitter ‘cancelling’ mid-sit over this. The HO told them the dog was leash reactive and now they are complaining that it is true. #shocker
We agree
If the HO told you the dog was leash reactive, they do NOT usually or have to clarify what the severity is. The sitter should have been okay with a dog that is mildly reactive to severe reactive. This goes hand and hand.
We have had a couple sits where the dogs were leash reactive and the HO told us to not walk the dog because they did not want to put us or the dog at risk while they are gone. IMO, HO should be respective of sitters because if a sitter is walking THEIR leash reactive dog and something happens, they would be at fault.
I’ m quite surprised how many say that a sitter has agreed to more or less any kind of «reactiveness» (even «severe» reactiveness) and also suggestions that a sitter should be removed from the site if cancelling.
I’m sure not risking my health for the dog of a stranger in fear of getting a bad review on a site online, and as I read THS terms that is the THS attitude. It is against THS terms to have aggressive dogs on this platform.
THS terms and conditions are very clear that they don’t allow animals that have attacked or are aggressive.
5.2.4. ensure that no pets to be left under the care of a Sitter have ever caused a person or animal any physical harm (no matter how minor the injury);
5.2.11. not have any inherently dangerous pets (such as venomous snakes or constrictors, primates, wolves or wolf hybrids, non-domesticated cats, alligators), banned dog breeds, or any animal with a history of attacks on pets or people;
As the terms are written, one could actually also say that «causing» «any» «physical harm» would include all kind of harm - also due to for instance causing harm dragging the lash (injuring shoulders, knees etc).
So in such a case as the terms describes the host would be the one that is «removed», if any.
It seems many sitters will endure much, much more than they are required to do - but this is not because of a «duty» of a sitter. They are being nice (sometimes too nice, and sometimes this can lead to expectations towards sitters beyond what the terms actually says).
As a pet owner who previously had a rescue that was leash aggressive, I would carefully consider for a sit
«Leash aggressive» is many, totally different things, and aggressiveness can be totally different with owner and others (no matter their experience). The owner of an aggressive dog is always responsible, in my opinion. For proper care (-r) and possible harm they might do. Although legislation can differ between countries, I’m quite sure that that would be how it is regarded apart from the site THS.
Leaving mid-sit I assume will not be abandoning pets. It will, I’m sure, be giving 24 hours notice so that the host can put into effect their plan B that they (and all members) should have.
Knee jerk reactions of leaving sits early and encouraging people to leave is concerning for me.