Burnley are facing up to a spell without Irish striker Jon Walters, who is sidelined with a knee injury.
The former Stoke City frontman this week pulled out of the Republic of Ireland squad for their upcoming World Cup qualifiers.
And Clarets boss Dyche has revealed Walters will need a period of rest before coming back into first team contention.
Dyche said: “Jon won’t make it for the weekend as we are still letting his knee calm down.
“We’ve had a view on it and it’s all common sense in terms of rehab and something we know about, but the knee has flared up and there is a settling down period for that type of injury, so we are unsure on timescales.
“I think it will be a bit of a while; we’re not sure yet, but it’s not going to be days. It’ll be longer than that.”
Meanwhile, long-term absentee Dean Marney and recent signing Nahki Wells are both now entering their own delayed version of a pre-season training schedule as they look to add more depth to the squad.
Marney has been missing since injuring his cruciate in last season’s defeat to Arsenal at The Emirates, while Wells is on the road to recovery following minor ankle surgery earlier this summer.
“Dean is making really good strides and is just breaking back into a first team training schedule and the daily life of a first team player,” explained Dyche.
“Nahki is doing the same and they are making a real shift at the moment.
“There is some time to go yet, but it’s good to see them out with the group, especially Nahki. Deano knows everyone, but for Nahki it’s all new and it’s good to see him out there.”