Marvin is 8 months old and has had a chronic rash on his belly since 8 weeks old. The vets can't figure it out they prescribe antibiotics which clears it up but it comes right back. We are now scheduled for a dermatologist at the end of the month. I have changed laundry detergent, put up all the rugs in the house put fresh sheets on all the furniture watched his diet. We are going nuts trying to figure out what he is allergic to. The only relief for poor Marvin and his constant scratching has been Benadryl. Anyone have any ideas or suggestions???