Oscar is 3.5lbs at almost 13 months and Ruthie is 2.4lbs at almost 7mths. I haven't had any serious issue with either of them. Ruthie has cost me more, but it was due to a corneal laceration - which could happen to any dog, any size, any breed - just dumb luck I guess. Other than that, I have never stepped on, smushed, etc. etc. either one of them. They're small, but they're fast - they'll move. I do have to be REALLY careful with Ruthie as she seems to have no fear and will readily jump off the couch/bed/your arms, etc. I have taught Oscar not to jump and can now trust him not to. Ruthie still needs work
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