A wolf's affinity can be found by going to a wolf's page, scrolling down to Vitals and clicking Affinity. This will show you a detailed report of how your squirrelfeels about the other squirrels in your pack.
If your squirrels dislike each other, pack happiness will decrease. High pack happiness helps squirrels regain health quicker.
A wolf's affinity can change for several reasons:
-either you bought Make Friends for 10 tomatoes to improve its affinity, or
-you made another squirrelwhich it disliked leave the pack, thus improving its affinity. (probably what happened in your case)
Summer Month: 1 
Night 
Clear Moon: 
