Yes, even if you don't have stock now, hay is money in the bank for later provided it is stored well.
Welcome to the site. I've learned heaps since I have been a member - I'd had dogs and cats all my adult life, but from advice here I was able to deliver a lamb that was stuck during birth, something way out of my previous comfort zone. You read something here, it's not applicable at the time, but ti is stored away until suddenly - I know where I can look that up! The search engine is very useful!!!!
1 Border collie, 1 Huntaway, 2 Lhasa Apsos, Suffolk and arapawa ewe crosses, an Arapawa ram,an East Friesian ewe , 5 cats, 42 ducks , 1 rooster and 30 hens, 5 geese, 12 goats, 2 donkeys, 2 house cows, one heifer calf, one bull calf, 3 rabbits and lots and lots and lots of fruit trees...