Oh, I asked this same question awhile ago. DS is just about 7 months and until about a month ago he also took 4 naps, the last one around 5. Now, he goes a little longer between feedings and so only takes three naps, but they are at 8:00, noon, and around 5 also. I don't have any advice about the dinner time nap, just reassurance that your little one isn't the only one sleeping before dinner.

My 7 mo. old still takes 2-3 naps a day sometimes every 2.5 hours or so. But I take her anyway. She sleeps in the car or in the store or wherever we happen to be. But I've always taken her everywhere. She goes out to dinner, lunch, professional society meetings. I love the dinnertime nap b/c then I can cook and sometimes even eat while she's asleep. She still goes to bed at 8 PM or 8:30 at latest.

My baby is 6 mos & 3 wks & takes a nap about 1-1/2 hrs. after she wakes (which is almost noon), then another around 3pmish & then one around 6pmish (so about every 3 hrs.). Regardless of when she naps or eats we're on the go. I don't believe in having to rule your life by a schedule. Because of that she can sleep anywhere.