A younger relative told me yesterday in casual conversation about how her housemate at university often asks her to pick up meat or animal products from the supermarket for her.
There's a few of them living together and all buy their own food but will all take turns buying loo roll, fairy liquid etc that are communal. My relative said that often when it is her turn to go and get these things, a particular housemate will often say 'can you pick me up some ham slices/ Cadbury chocolate' etc whilst you're there. This relative is a passionate vegan and feels very strongly against animal cruelty etc and has been vegan for 5 years as a result. She said that she'll usually say no to the friend because she doesn't want anything to do with the purchase of animal products but will offer her a vegan alternative (i.e I don't feel comfortable buying you cadburys but am happy to get you oreos or bourbons instead etc). Apparently the housemate often gets annoyed at this response and will roll her eyes about how she's being ridiculous because housemate offers to give relative the money to buy the items so it's not coming out of relative's pocket. Relative still says she wants nothing to do with the purchase of animals or animal products.
The relative says she never asks her friend to pick her up any snacks or food because she doesn't want to feel like she has to reciprocate by buying her housemate food which goes against her values.
I think it's pretty awful of the housemate to put her in that position tbh. You wouldn't ask a committed Muslim to pick you up a bottle of wine would you and I don't see much difference in this scenario