Is there a time limit for sending in photos after a modeling scout asks for them?

So I recently submitted some photos to ford models and they responded requesting more photos taken outside in natural light and with certain poses and attire. The only problem is that school work and daylight savings make this incredibly hard to do. It will take me at least 2-3 days before I have the time to respond, does this look bad? Will I be killing my chance before I even get it by not responding quickly? Also is it common for them to email back?

If Ford is interested in your "look", then if it takes a few days for your photographer to take outside photos of you, there probably is nothing to worry about, however you do need to keep them appraised of what is going on.

Besides having a unique look, dependability is paramount when it comes to getting work as a model.

Normally they want you to respond in 1-2 weeks.
2-3 days is fine and perfectly normal as they know most people will need time to get more pictures

None really. Use common sense. The longer you respond, the more likely the agent will forget about you.

It's always best to set the expectation. Letting them know when they should expect a new set of photos from you is setting the expectations. Not telling them leaves them in limbo wondering what's going on.

Oh, and when setting the expectation, it's ALWAYS better to under promise and over deliver. If you know it'll take 1 week, then tell them 1.5 -2 weeks so when you come in sooner than expected, you look better. Telling them one week, and taking more than a week is a sure-fire way of building up a bad reputation for yourself.