Unlike other Harvest Moon and Story of Seasons games, the maximum heart level that can obtain with purchased livestock is 5 hearts . Players can only reach 10♡ through patience and breeding, meaning they cannot receive higher rated products without putting in some effort.

Baby animals born on the farm will automatically have an affection level of 3♥. Additionally, their max affection level will be 1♥ more than their parents.

Once a player has unlocked a new heart level threshold, the offspring of any new, bought animals, of the same type, will have that threshold. For example, if the player breeds an 8♥ chicken, they will be able to purchase a chicken with a 5♥ limit from PoPoultry. The offspring of that chicken will then have an 8♥ limit.

Hearts	#	Affection Points	Conditions	Byproduct
	0	0~24	None	Small Byproduct / Normal Quality Egg
	1	25~49	None
	2	50~74	None
	3	75~99	None
	4	100~124	None	Medium Byproduct / Good Quality Egg
	5	125~149	None
	6	150~174	5♥ animal has baby
	7	175~199	6♥ animal has baby
	8	200~224	7♥ animal has baby	L Byproduct / Pretty Good Quality Egg G Byproduct* / Gold Egg P Byproduct** / Platinum Egg X Byproduct***
	9	225~249	8♥ animal has baby
	10	250	9♥ animal has baby
Further Requirements for Higher Ranked Byproducts * G Byproducts require the animal to also win their target festival (i.e. cow wins the cow festival) ** P Byproducts require the animal to win their target festival AND have grazed more than 1,000 hours in total *** X Byproducts have a 0.4% chance of being produced from animals which produce P Byproducts