Do you think if Adam and eve never sinned, there would be domestication and domestic animals?
Your question has a clearer answer than your probably realize.
Just taking the text of Genesis as the base, there are a few things to realize from the very beginning, before the Fall.
First, Eve, and the various other mammals, were made with breasts. Milk drinking was intended to mankind from the beginning. In the modern world we do not do this, but in various ancient societies around the world...I'll skip the rest of that detail because it's distracting from the point.
Second, when mankind was made, before the Fall, he was given rulership over the animals.
Third, when Adam named the animals, they are divided in the text into different types, with a distinction between the herd mammals (who are also, incidentlally, the milk-bearing clean mammals) and the wild mammals. There was a distinction from the beginning, before the Fall, at the time of the first naming of the animals, between the tame mammals - which are domesticated for milk - and the wild ones (which are not).
Fourth, out of the Garden, the children of Adam and Eve were herding milk animals. Hevel ("Abel") gave of the milk of his ewes as a gift to YHWH. Man didn't start eating meat (legally) until authorized after the Flood, but the first gifts given by men to God were of food: milk and plants.
God formally told mankind to eat the plants at creation, and he gave man meat to eat after the Flood, but at no point does God formally give man milk to drink - yet it is implied from creation itself, by the human breasts, by the distinction between tame and wild animals, and by the herding of sheep by Hevel and his offering of milk - which is NOT food gained "by the sweat of the brow", but through the peaceful (non-killing, non-carnivorous) dominion over the tame animals.
Adam and Eve in the Garden were probably lacto-vegetarians. For in a world where wild animals don't shed blood, and where man has dominion, yet a distinction is made between herd and wild animals - and where God never formally says "You can drink milk", but clearly men do, what PURPOSE the distinction or the designation.
And the fact that the first gift to God, an acceptable one, was the milk of the ewes of his flock by Hevel.
Domesticated animals were created and lived in Eden. It's actually there in Scripture, if you read carefully and think about the implications of what you are reading. You have to make some inferences that are not affirmatively stated.
God never in the Scripture affirmatively gave milk to man to drink, but he made Hawah with breasts, and he accepted Hevel's offer of sheep milk.
If animals are not killed for meat, what purpose is either dominion or herding them? Answer: milk.