Fat or male dewlap?

[Apollo’s Slave]

I feel like I’ve been posting so often with so many different questions. I got home from my mums about an hour ago and I went to my room to spend some time with Apollo.
I noticed that he has a small thing under his chin.
Is that fat or a dewlap like females get?
I’ve owned a male Netherland dwarf rabbit and he didn’t have the same thing as Apollo.
Is that a Rex thing or is he not being fed properly?
By the way, Apollo is a 1 years old, male, neutered Rex rabbit.

Edit: I just looked at the pictures I took when he was in the rescue centre and he had the same thing but I’m still not sure if he’s overweight?

Thanks in advance!

The first two photos are him now. The 3rd is when I went to visit him at the RSPCA and the fourth is his photo when he was on the RSPCA website.

 

[Hermelin]

If he have been far before the dewlap won’t disappear instead it will just be empty without fat in it.

But how does his body feel like can you feel his spine and hip bone. It shouldn’t feel sharp but you are supposed to feel them.

Doe can get dewlap because of hormones. Not common among bucks having it.

My own overweigh bunny have a really fluffy bum, so it’s impossible to feel his hip bones and I can feel all the fat there :3

 

[Apollo’s Slave]

I can feel them under a lot of fur. His fur is quite thick because he grew a winter coat since he was an outdoor bunny. I think he’s okay but I knew that bucks don’t usually have them. When I take him to the vet I’ll bring it up (to get vaccinated or get his nails cut)

 

[Hermelin]

If you can feel the bones, then it’s nothing to worry about ^^