are they cedar chips? And yes, any meat flavored baby food is good for syringe feeding. They seem to like turkey most. Mix with calcium and/or multivitamins, maybe a little water, and let him lick it up. How much are you forceing him to eat. What does he weigh, and what are the details of your husbandry? (temps, cage size, humidity, how did this start, etc.) we need more info if you want useful answers.
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1.0 Pastel/Jungle Leopard gecko from JL (BJ)
1.0 Hypo from Crested (Apricot)
1.0 Albino Hypo? (Cloud)
0.4 Normal/Hi-Yellow Leopard gecko (Beatrice, Goldie, Freckles, Pepper)
0.1 SHCT Leopard Gecko (Brite)
0.1 TBD Leopard Gecko (Rainbow)
0.0.2 Corn Snakes (One snow, One red albino)