There is some water poured over Ted's head off-screen, but very light and comedic. Ted is revealed to have killed a squirrel with some sort of gun, but the squirrel turns out to be alright. This is all off-screen. It's slapstick, after all. And, arguments are common. Nothing that bad. Just funny.
In one episode, someone is in a leg brace. Presumably implied from skateboarding. Not a main character, but, they're sitting next to a main character. Bob and Merle have arguments, all the time, like, Bob says something like "Hi-dee-ho-dee, everybody, Bobby Bullpitt. Don't swoon, I'm human." Merle then asks something unusual, like, "If you're human, how come you eat with your feet?" or "If you're human, how come you sniff all the dogs in the neighbourhood?" (It's different each episode.) Merle says to him "Don't you start this with me." And good old Bob responds with "Wouldn't I? Wouldn't I?" It just stops there, but, it doesn't go on. Played entirely for laughs.