It’s also true that larger dog breeds have shorter lifespans than their smaller counterparts. ** Scientists are still unclear as to why this is . Some believe that they age faster because of the strain their size puts on their bodies, and vets recommend geriatric check-ups on larger dogs at about seven years of age. Smaller dogs, by comparison, have geriatric check-ups starting at 10 or 11 years old.
Should there be a ‘so’ at the end of the following sentence? Scientists are still unclear as to why this is .
Thanks.