Debbie, I think that he looks very healthy and like others have said he may have some siamese in him so he'll continue to be on the slender side.

My Sunny is an Aby mix so he'll always be slender and he's very healthy 5 year old. Starr is almost 8 months old and he still only weighs a little over 6lbs. The vet told me that this is normal for him. Hopefully Eliot is fine but a vet check up sure won't hurt him. Please keep us updated.