[cypher]

Hi & welcome to HC

Your boys look lovely & sound very cute!
No idea about Myachick feeling soft & not having strong ribs, without actually feeling him it's not really possible to comment but it does sound as though he's doing fine.
Chewing bars can be down to a number of reasons, the cage may be too small or lacking in enrichment, it can also be attention seeking behaviour, it is important to try to stop it though as it can lead to damage to teeth & the area around the nose & mouth.
Have a look here for some ideas.
Managing Bar Chewers
The grooming behaviour is totally normal, don't even consider getting them a girlfriend! Breeding is not something to be taken lightly & as you don't know their history or genetics could lead to all sorts of problems for mother & pups. They really don't need a friend at all.