That's certainly good news, but both players' statuses for Sunday's division rivalry in Green Bay is still uncertain.
Both were limited in practice Friday and are listed as "questionable" on the injury report.
Houston and Johnson missed the previous two days of practice; Houston with a hamstring injury and Johnson with a sore knee.
In previous weeks, the Lions have had instances where a player returned to the practice field on a Friday and still didn't play on Sunday. It happened with defensive tackle
Receiver Patrick Edwards (ankle) and Fox (groin), who have missed multiple games due to their injures, are listed as probable.
Also probable are: defensive end Ziggy Ansah (abdomen), safety