u can buy ur frds, or u can buy complete strangers it doesn't really matter i guess. but sometimes owners will be angry if u keep buying their pets so is kind of better to ask the pet if u can buy them first. other safe way is to buy 'free human'....the 50 pts ones.
to get points, u get thumbs by posting comment/tale/ poll/in herds and each thumb worth 10pt. posting in yelp each comment worth 20 pt. clicking poll 2pt per poll, inviting frd 100pt per frd, looking at people's profile, 5 pts per profile. logging in 100pts every 2 hours.....etc. plus if someone buys ur pet then u get some profit...
u use the points to buy pets la. and if someone buys one of ur pet and u want to buy it back, the price will keep going up. so if u want to back it back u will need more money, understand?
also if u love ur pet u should buy things for it from the shops (or make things in ur own shop)...food etc la.