It is because if you are not a member you can only have up to 2 moshlings but if you want lots more you should become a member. and you Cant delete them or recycle them.
you can and ive got five but you have to hAVE THEIR SISTER OR BROTHER FIRSTchi chi(chop chop's sister)3 black snap applesor2 red star and i black dragon fruit
friggy (iggys brother)
1 white crazy...
there are different types of mosh lings and you have to pick 3 different or the same say that i got 3 dragons from the moshing shop it is the cart by the way then i have to wait for it to grow you...
well everyone can have the same amount 52 is the highest but you can get as many as you want because you can get more than 1 of each you could get like 100 of just one moshling hope that helps you
You should try clicking Monster owners you see in Monstro City until you find the Puppy Moshlings. There are lots of monster owner who have them already.