I am not sure why they are called MASH mobile animal services on here - usually it is Main Street Animal Services of Hopkinton (MASH for short). At any rate, we searched for vets all over the greater Boston area. We have five of our own cats and we are regular foster parents of abandoned kittens. While this tends to be a bit more expensive than your regular vet, it is because they actually take time to listen to you and spend a little time with your animal so that they get a sense of what is really wrong. This is not the vet our shelter uses (because there is one that gives our shelter a bigger discount) but at least 10 times we have paid out of pocket for our foster kittens to go here so that we could find out what was *really* wrong after the shelter vet misdiagnosed or didn't take time to really figure out what was wrong with very ill kittens. Some of the treatments they use are alternative and might seem weird at first, but if you wait and see, your animal will probably get better. We have been a little skeptical a few times (okay, maybe a lot of times) only to see in a week or so that cats that were said to only have days to live and are incurable get better. Of course, they aren't miracle workers, but they do a wonderful job supporting the overall health of your animal and are able to treat and deal with things that other vets are not able to do. Highly recommended for both routine and acute care.