I'm not so sure, but I'm willing to be convinced -- please do not get hostile/defensive. For starters: are you talking about uplifting individual specimen or entire species, having a sapient globe as your end goal? Furthermore, you don't anywhere state the reason to why we should do this? What's the point?
Is it for the sake of the animals, for biocentric, 'anti-speciesist' reasons? I could understand enhancing animals to perform work, but that would then be ethically questionable, amounting to slavery.
Thing is, I'm anthropocentric, and don't understand this sapientcentrism thing at all. At present, animals (and machines) are used to serve humanity, and this situation is ethically justified by their non-sapience. I just can't see any reason to change this for humanity beneficial situation, other than for biocentric -- irrational -- reasons?
Uplifting dolphins and other already bordeline sapient mammals into the sapient community I can understand, but why spiders, a species fundamentally different, and with for humans absolutely revolting practices? Or plants, why..? All of this is a big question mark for me really, so please enlighten me.