Welcome to Yt to both of u and congrats on your furbabies, yes 6 weeks was too soon, glad every turn out ok. On the feet and pants biting I will give a strong No , not yelling just NO and if she cont, I would than put her in her crate right after she does this just for 1/2 hr , when she gets out see if she does it again, if she does back to the crate. It may take a while until she understands the word no not nice.
Good Luck and welcome to the puppy world Lol.
bark@ulater!!!!
manina,miley

,max