John Gill Commentary Numbers 15:11

"Thus shall it be done for each bullock, or for each ram, or for each of the he-lambs, or of the kids." — Numbers 15:11 (ASV)

Thus shall it be done for one bullock
Such a quantity of flour and oil for the meat offering, and such a quantity of wine for the drink offering as before expressed; making no difference between one young or old:

or for a ram :
which, Jarchi says, was thirteen months and one day old:

or for a lamb, or a kid ;
for a young one of the flock, whether of the sheep or goat, whether a lamb or a kid of the goats; which, according to Jarchi, were within a year, not a year old.