humphrey had the pear shaped one with the hole in (a bit like the dummy one Mudmagnets mentioned but without the handle bit). They do various versions but we started with the puppy one.
I found them to be one of the best pieces of puppy paraphernalia in our whole „start up kit“!!
A bit of liver past smeared inside was a bedtime treat for ages, - he‘d happily go into his crate and the effort of licking it clean had him snoring away in no time!! I used to fill it a bit fuller (liverpaste and bits of dried food or whatever) if we had to leave him for a while.
Filled with joghurt and popped in the freezer, they‘re soothing for teething gums aswell.
They‘re „relatively“ expensive but more or less indestructable, Humphrey‘s still got his. (He’s 4 now) We don‘t use them as treats anymore but they can be used like a ball , because of the shape, they bounce in all directions so are quite fun to play with. Can certainly recommend.
Looking forward to hearing all about Archie!!