How do you feel about mice that have already been humanely killed? Feeding live rodents is not recommended for pet snakes anyway and the standard practice is to use frozen (thawed) rodents. Snakes only eat about once per week. They need whole body prey to get all the nutrients they require so cubes of meat would not be sufficient in the long term. There are some nutritionally complete commercially processed snake foods available that come in a sausage like form but not all snakes are likely to transition to taking that without some effort.

No. Snakes are carnivores. They eat meat. You can get a snake that is accustomed to eating frozen/thawed rodents, though. There are many online frozen rodent retailers, like rodentpro.com. Just buy from a reputable breeder and ask if the snake is taking f/t. You could also get a species that eats bugs, but they are usually more fragile in captivity. But do a ton of research first, read many caresheets online. Snakes are more complicated than your average pet. Good luck.

No has to have meat. Maybe given frozen thawed animals instead of live, but must eat meat. There is an Expensive alternative that comes in sausage like links, but it is never seen in pet stores or other stores. It may be ordered off line. Here is a link.

http://www.petclubuk.com/sp/re.....-size/1274