Contradiction with Proverbs 10:3
Proverbs 10:3 suggests that the Lord will not allow the righteous to hunger, while Psalms 104:28 implies that all creatures depend on God for sustenance and may experience lack if He does not provide.
Proverbs 10:3: The LORD will not suffer the soul of the righteous to famish: but he casteth away the substance of the wicked. [the substance...: or, the wicked for their wickedness]
Contradiction with Matthew 6:26
Matthew 6:26 indicates that God feeds the birds without them sowing or reaping, whereas Psalms 104:28 presents the idea that creatures receive their food when God provides it, which can involve effort on their part.
Matthew 6:26: Behold the fowls of the air: for they sow not, neither do they reap, nor gather into barns; yet your heavenly Father feedeth them. Are ye not much better than they?