Long Wang said:

Battle boosts and pelt defects are pretty popular but hard to breed for without the risk of other boosts and CP penalty defects. Battle boosts include DH which increases max health to 150 instead of the normal 100. Others include SV, ES, CS, and UL which details plus other boosts, can be found Here.

Pelt defects change a wolf's pelt not the max CP allowed, which is the CP penalty defects. Pelt defects include but are not limited to, Ery's, Leuc's, Axanthic's, Mela's, Albino's and Amela's. GB and Infatuation are pelt boosts with a CP boost and are mostly wanted for their pelt not their CP. a complete guide to these defects are found here.

other things that might be wanted to breed for include high rarity AC's (all common pelts) or rarer pelts such as dynamic, exclusive and crystalline. I cannot find the guide I wanted but here's one for crystalline pelts breeding. Crystalline pelts guide

i can't find the guide I'm looking for but feel free to perform your own board searches or ask others.