Danny Wilson will give the pair as long as possible to prove their fitness as the Blades continue their push for automatic promotion.
Striker Kitson was forced off after an hour of United's goalless draw with Carlisle on Easter Monday after picking up a hamstring problem, while defender Hill was left with double vision following a collision and was replaced at half-time.
Full-back Tony McMahon is definitely missing as he starts a two-match ban after picking up his 10th caution of the campaign, while on-loan striker Dominic Poleon has been recalled by parent-club Leeds.
Jamie Murphy replaced Poleon at half-time on Monday and could be given a start after he has recovered from a hamstring injury.
The Blades are six points behind leaders Doncaster having played two games fewer.
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