Hi Ashley, your dog got into the biscuits did he!
Depending on how many hes eaten look out for him throwing up, loose runny stools and obvious stomach bloating and pain.
If he gets these 3 symptoms you need to take him to a Vet. Hopefully he will be alright but go easy on feeding him especially today and tomorrow. It takes up to 48 hours for food to go through a dogs system and it would be wise to let all these biscuits pass through before you give him more food on top.
Hope hes ok!
I would not use dog shampoo because depending on the active ingredient it could be toxic to the cats body. Instead of taking chances I would just not use it unless it’s labeled for cats.
i got natural chemisty cat and kitten shampoo throw away the dog shampoo thanks for you advice