I would not give aspirin for more than 3 days in a row.
You should be able to get these without a script.
https://www.jedds.com/shop/trimethoprinsulfa-100-g-medpet/
https://www.jedds.com/shop/tylan-soluble-100-g/
You should be able to get these without a script.
https://www.jedds.com/shop/trimethoprinsulfa-100-g-medpet/
https://www.jedds.com/shop/tylan-soluble-100-g/