This is all of the money I've spent on my pets this month:

Dog:
~$200 on food/supplements (she's on a raw diet and I buy her all the best)
~$200 for hip and elbow X-rays
~$20 on treats
~$30 for herding
~$130 for agility
~$20 for CGN test
~$30 on cream (she cut her hock)

Foster kitten:
~$20 on food
~$50 on medications and Lysine supplement

Rats:
They eat the dog's food so that's included in the $200 above
~$25 for shampoo
~$10 for parasite shampoo (they had lice)

Mice:
~$50 initial cost

Betta:
~$6 on food