1. You can buy carrots at the stable master lol
2. The only stuff you can buy with pearls in the beta from what I know is house equipment and decorations( bed, wardobe, couches, etc) for your residence in the main cities.
3. If you want more pets and food for the beta make another character and beat red nose again it will drop another ultimate package bundle with all of the items in it for that character. I currently have 5 pets ( 2 dogs, 2 forgans, and the bird) you will only be able to take out 4 pets and for some reason you can only have one level 2 forgan pet out, you can't have both of them out at the same time.