My boys have a 4 year age gap - Scruffypig is 5 and Gingerpig is 1. They have a real bromance going on and don't like being apart even for a second (claw clipping one results in the other wandering round trying to find the other, then looking really surprised when he turns up again
).
The only problem I find is that Scruffy now takes a leisurely approach to meals whereas Ginger can't scoff it down fast enough. No problem with nuggets or hay as they're constantly available. When I put their fresh veg in, Ginger has eaten half of it before Scruffy's really noticed it's there. I've tried separate piles but Ginger dashes over to eat Scruffy's from under his nose then goes back for his. Think I'll have to start taking Ginger out so Scruffy can eat properly at his sedate pace.