AIO for getting angry at my husband for continuously acting as though dry dog urine is not dirty.

Our feeble sick dog is half covered in dry pee and I’m not sure if I’m overreacting to my husband not washing his hands each time he touches her. I’m overwhelmed because I now feel like I have to clean all these things he’s touched because he’s forgetting or just refusing to wash his hands after handling our very ill elderly dog. We’re not washing her at the moment because she’s had back to back seizures where she falls over urinating and defecating on herself. She been pretty feeble until now and we didn’t want to put her through the stress of another bath until she was more stable.He did bath her the first time, before he went to work, so he’s not unwilling to help with the situation. He doesn’t deny she’s dirty but he can’t seem to be bothered to wash his hands after petting her. He literally said he doesn’t think there’s anything harmful in dog urine. He went as far as to say that some people used to wash their clothes in pee or set dye with pee. He and I have being seeing this issue very black and white, I think if there’s pee, it’s dirty, whether or not it’s dry and to touch it and the touch something else means that dirtiness has been spread. He disagrees. He wants to pet her often especially given that we’re not sure how much time she has left, that’s fine but then he proceeds to tough everything after. Me. Furniture. Clothes. Our bedding. His hair?! All without having washed his hands. Her pee has been dry during all this and I can see how easy it would be to forget to wash but when I bring it up he gets frustrated with me. Then literally minutes later will touch the dog again and then touch me and when I look or sound sad, he’ll ask what’s wrong and I’ll try not to say because I know it’ll just frustrate him but then he’ll keep pushing, worrying himself over what I could be sad about. If I do tell him, he immediately gets frustrated, acts like I’m being ridiculous and then we either argue or I worry the worst will happen and that my inability to just let the pee be will push him over the edge and eventually cause him to not want to be with me. Obviously I’m catastrophizing, but it’s the thought process my mind goes through. He’s making me feel so bad for continuing to keep at him over this, that I feel like saying please don’t leave me over this. I say and feel this but in reality, I feel most people would be bothered by touching dry pee and then touching everything else without washing their hands. I’ve tried reasoning with him telling him if it was wet pee he’d certainly want to wash his hands but while he agrees, he seems to believe dry pee is in a different category. I’m laying here in bed next him, the love of my life, I practically hate him right now but I definitely still love him, and I want to flick him off in his sleeps because I’m that fucking angry over this issue that he’s making me feel crazy over. I work from home, so trying to clean everything he’s touched is doable but it was so fucking preventable. Now I have hours of cleaning that I feel I can’t ask him for help with because of how belligerent he’s been about the dry fucking pee. As of today, our dog seems better and I will be looking to give her a bath asap to end this weird issue between me and my husband. But this isn’t the first the pee issue has happened and it probably won’t be the last. We have a wonderful communicative relationship, I usually feel so lucky to have my husband as a partner through life. But every now and then we have the weirdest fucking issues where I just don’t understand how he’s okay with things that me and my close confidants think is crazy.