What could it be ?

For how long has this gone on?

This could be medical.  Have you taken your cat in to check for a UTI?  If not, this should be step 1.  Take a fresh urine sample with you, if possible.

This could also be behavioral.  Is your cat stressed?  Do you have two or more litterboxes (one per cat plus one), and does your cat use any of them?  Have you tried different litter types?  Has your schedule changed suddenly, or is someone new in your life?  Could your cat be bored?  Do you use room sprays and scents that might bother him?  Do you have other animals in your home, and could any of them be picking on him?  How about people – do you live with any other people, and could they be harassing or otherwise mistreating him when you’re not around?

It could be mange.  Get her to the vet for a skin scrape to determine the cause.

There are two types of mange.

Bald patches are not normal.

Do you have a question?

I cannot recommend a dose of medication for your dog.  I would contact the prescribing vet to find out their recommendation.

I would recommend a thunder shirt to see if that helps instead of medication.

Looks exactly like my dogs back right now, and we have a bad case of the fleas. I am calling an exterminator tomorrow, I would recommend doing the same and getting her treated with Front line and a flea collar

He is a fancy mouse btw.

No.  Not at all.  Please get your turtle to the vet.

Then whomever is caring for your turtle needs to get it to the vet.

Honestly, I’ve never encountered it before, but I would imagine – assuming this is an aquatic turtle – that it’s due to infection from bad water.

Is this an aquatic turtle or is this a land turtle? Aquatic turtles live in the water.

And you’re changing the water daily? Hmm. Are you treating the water to ensure it’s safe?

Well, my guess still goes to infection. Unfortunately this *may* require prescribed meds from your vet. As I am NOT a vet, I cannot tell you exactly what might be needed.

He should be okay. Watch his movements for the husks to pass and monitor his behavior and eating much more closely for the next couple of days.