If yes, How many a day do you recommend just for like treats?
Sunflower seeds are like the McDonalds of pet food. They're not very good since they are high in fat. Most critters favor them, so if they're in a food mix, they pick them out and eat them first, and will leave the healthier stuff behind.
A few given as a treat here and there (unsalted, with or without the shell) would be fine. You can give them much healthier things though - like fresh fruits and veggies, and even some meats/fish/bones. A carrot stick or chunk would not only be healthier, but would give them something to chew and gnaw on. Even a thick chicken bone, like a chicken leg (with a lil meat on it to make it extra special and fun) would be much better. A can of oysters is usually also appreciated by rats. They smell and look nasty, but you can find them for about $1 a tin, and the ratties usually happily devour them.
Yes, they can eat sunflower seeds, or so I've heard. Don't give them some every day!
Once a week is fine!
you can feed them a few a day it also keeps weight on the rat.
yes any kind of seed as long as it is not salted
Yes they love them, but in small amounts, because they are high in fat.
IT's fine =)
Just make sure that theyare not salted..