Hello and welcome to you and Darwin. I rehomed a 4-5 year old TAG (they weren't sure of age) this past June. It took about six weeks for him to "settle in" and get used to us, but we do very well now, and I think he is happy. I know I am!
Hello and welcome! I'm a newbie, but someone with experience will be along to address your specific questions. I rehomed a 5 year old TAG so don't have any experience with babies. Good luck and God bless
Funny, but as newbie mamas and papas we get so wrapped up in feeding, entertaining, toxins, behavior, do's and don'ts that the little things like anatomy slide right by! Ha.