If the rats are being purchased from a pet store, and their chances of otherwise ending up in a good home are slim, while their chances of being bought by owners of boa constrictors (or other reptiles) are high, aren't the rats better off coming along with a bike tourist, even though there may be some risks involved? At least the odds are better, it seems to me, given a reasonable level of care and affection and attention to comfort (including something like a shock-absorbing system for handling bumps, and avoiding terribly bumpy rides).
Does touring have to be a zero-risk affair for them?
And couldn't a similar thing be said for certain other animals, including those adopted from animal shelters that have low graduation rates?
Two rats seem better than one, and younger animals seem better than older ones because they can probably better adjust to touring, to experiencing it as normal, or to taking it in stride and enjoying it.
Given the choice between an 85+% chance of becoming snake food, for example, and going on a bike tour despite some risks (and perhaps even some occasional discomforts), which would most rats choose (if they could make the choices, or if we could know their choices, or if we could know their minds or hearts, or if we could communicate with them or have a dialogue with them)? -- or which would you choose if you were in their positions?