feed
The German word 'Futter' is used in the same way as the English word 'feed'. It refers to the food that is given to animals or pets. For example, 'I need to buy more feed for my dog.' would be 'Ich muss mehr Futter für meinen Hund kaufen.' in German.
I buy food for my cat.
The mentioned sentence simply means that the speaker is buying food for their cat. 'Futter' is a term commonly used in German to refer to food for animals.
My dog's food is very expensive.
In this case, the speaker is informing that the food they purchase for their dog ('Futter') is quite costly. This sentence might be used in conversations related to pet ownership.
I have put the food in the bowl.
The speaker is telling that they placed the animal's food ('Futter') in the bowl. This sentence could be used when discussing feeding habits of pets, indicating that the task of feeding the pet is complete.