Our daughter had a rough time from 10 months to 24 months due to an undiagnosed milk protein allergy. Nom-stop sinus infections and congestion that turned into respiratory infections, ear tubes in the hopes it would help... Allergic reactions to antibiotics because of over-exposure... ER trips. They thought she had Cystic Fibrosis... Nope, just a cows milk protein allergy.
My advice is to try wait on introducing cows milk or formula based on cows milk until around 15 months; if you notice symptoms, stop the cows milk. My daughter drinks whole goat milk and has no problems with it. However, because she was exposed to cows milk for so long as a baby/toddler, she is really sensitive to cows milk--had to cut EVRYTHING made with cows milk/dairy out of her diet. You probably don't want to have to read food labels, so my advice is to postpone cows milk for a while longer.
As for goat milk, the brand we buy is Meyenburg (purple &white carton) and is quite common in our regular grocery stores out here. Note, she drinks goat milk and eats goat cheese because she started it while a toddler (15 months). But I hear it's harder to introduce alternatives to cows milk/dairy if you introduce it after the child is 2 yrs. By then, they can't get used to the goat taste, especially if they're used to the taste of cows milk.