C.W.
Hi A.
If the red spot is only on the white part of the eye he will most likely be ok- but if any of the red is on the color part or the pupil I would most difenitely get him to an eye dr for a look see. If it is only on the white part and does not seem to be giving him any problems with him rubbing or scratching at his eye then the red will mostly likely go away shortly.
good luck and blessings